The central weight-bearing pads of an animal's foot are _______ pads.

The central weight-bearing pads of an animal's foot are indeed the metacarpal and metatarsal pads. These pads play a crucial role in supporting the animal's weight during movement and providing shock absorption. The metacarpal pads are located on the front feet, specifically on the distal part of the metacarpal bones, while the metatarsal pads serve a similar function on the hind feet.

In animals such as dogs and cats, these pads are typically thicker and more robust than other types of pads, helping to withstand the pressure and impact involved in walking, running, and jumping. This structural adaptation allows the animal to engage in various activities while protecting the bones and joints from excessive stress.

The other types of pads mentioned in the options serve different functions: digital pads are located on the tips of the toes, carpal pads assist with grip but are not central weight bearers, and interdigital pads are found between the digits. None of these fulfill the primary role of weight-bearing that the metacarpal and metatarsal pads provide.